In the production function, the paper derived China's actual trend of the marginal cost function under the assumption that there is adequate supply of labor in the coal industry.
在生产函数的基础上，本文推导出在劳动要素充分供给的假设下，我国实际煤炭产业边际成本函数的变化趋势。
In the production function, the paper derived China's actual trend of the marginal cost function under the assumption that there is adequate supply of labor in the coal industry.
在生产函数的基础上，本文推导出在劳动要素充分供给的假设下，我国实际煤炭产业边际成本函数的变化趋势。
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